215257441 has 36 divisors (see below), whose sum is σ = 271375632. Its totient is φ = 170127216.

The previous prime is 215257439. The next prime is 215257463. The reversal of 215257441 is 144752512.

It is not a de Polignac number, because 215257441 - 2¹ = 215257439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215257411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 760486 + ... + 760768.

It is an arithmetic number, because the mean of its divisors is an integer number (7538212).

Almost surely, 2^215257441 is an apocalyptic number.

It is an amenable number.

215257441 is a deficient number, since it is larger than the sum of its proper divisors (56118191).

215257441 is a wasteful number, since it uses less digits than its factorization.

215257441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 352 counting only the distinct ones).

The product of its digits is 11200, while the sum is 31.

The square root of 215257441 is about 14671.6543375313. The cubic root of 215257441 is about 599.3116559765.

The spelling of 215257441 in words is "two hundred fifteen million, two hundred fifty-seven thousand, four hundred forty-one".